25232932864
domain: N
Appears in sequences
- Number of permutations of {1,2,...,n} that result in a binary search tree (when elements of the permutation are inserted in that order) of height n-1 (i.e., the second largest possible height).at n=28A076616
- a(i) = the number of occurrences of 9's in the palindromic compositions of n=2*i-1 = the number of occurrences of 10's in the palindromic compositions of n=2*i.at n=29A079862
- Row sums of triangle A133085.at n=30A133086
- a(n) is the smallest positive integral multiple of 2^n not in the range of the Euler phi function.at n=29A181662